Bronzing-machine



(No Model.)

' 2 Sheets-Sheet 1. J. F. SARGENT.

BRONZING MACHINE.

Patented Sept. 27, 1881.

Inventor f/ %WM n1 D. (L

(No Model.) 2 Sheets-Sheet 2.

J. P. SARGENT.

BRONZING MACHINE.

No. 247,582. Patented Sept. 27,1881,

M/z'in eacs e5, Invent 01 div/7 M P N. PETERS. Pmmumo m hnr, Watllmglnn.0.1:.

UNITED STATES PATENT OFFICE.

JOSEPH F. SARGENT, OF WORCESTER, MASSACHUSETTS.

BRONZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 247,582, datedSeptember 27, 1881.

Application filed July 15, 1881.

To all whom it may concern:

Be it known that I, J osEPH F. SARGENT,0f Worcester, in the countyofWorcester and State of Massachusetts, have invented certain new anduseful Improvements in Bronzing- Machines andI declare the following tobe a description of my said invention sufficiently full, clear, andexact to enable others skilled in the art to which it appertains to makeand use the same, reference being had to the accompanying drawings,which form a partof this specification.

This invention relates to certain improvements in the construction ofmachines for applying bronze or other fine powderv to the surface ofprinted cards or sheets of paper and forsimilarpurposes,theobjectofmysaidinvention being to provide an efficient and practical mechanismadapted for use on small or large sheets without requiring specialadjustment for the particular sheets to be operated upon; also, toafford convenient facilities for taking up the surplus bronze-powder;also, to perfect and simplify the operative mechanism, and to furnishdevices for feeding'and distributing the bronze in a thorough andeconomic manner. I attain these objects bymechanism constructed andorganized for operation as shown in the accompanying drawings and hereindescribed, the particular subject matter claimed being hereinafterdefinitely specified.

In the drawings, Figure 1 represents a plan view of my improvedbronzing-machine, the top casing being shown in section. Fig. 2 is alongitudinal vertical section at the position indicated by line as w onFig. 1. Fig. 3 is a vertical sectional view of the feeding devices forapplying the bronze to the printed sheets, drawn to a larger scale. Fig.4 is an end view of the machine, showing the gears, and with dottedlines showing the positions of bands at the opposite end of the machinefor operating the several rolls and brushes. Fig. 5is avertical sectionon a larger scale, showing details of constrnctionof one of the brushingdevices. Fig. 6 is a longitudinal Vertical section of one of the brushdevices at the position indicated by line 51 g on Fig. 5, andFig. 7 is abottom View of one of the brushing devices.

In the construction, A denotes the frame or casing for supporting theoperating parts. B

13, upon which it'rolls.

(No model.)

indicates the endless carrier or cylinderon which the cards or sheetsare supported and carried forward in the machine while undergoing thebronzing operation. E is thefeedtable, and D the delivery or flyi tablewhereon the sheets are deposited when finished.

F indicates the feed-hopper in which the supply of bronze is placed. Thesides of said hopper are hinged at or neartheir upper corners,as at f,and are connected by bolts F,

having thumb-nuts, so that said sides can be in Fig. 3, with a slowmovement, by belt from v the cylinder-shaft, or otherwise.

The end supports, F, of the hopper F and roll F are made taperingdownward, and are fitted to corresponding recesses in the frame A, sothat the parts can be readily removed from the machine when desired,first raising thecover a, which closes down upon the top of the hopperand ends F in the manner illus trated. After removing the hopper anddelivery-roll F the distributing-roll G can be taken up from position,as the end pieces, F are made to form or to rest upon the bearingcaps ofits journals. 1 I

The distribu'tin g-roll G has a surface of chamois leather, or othersoft material of similar nature, and is arranged to have surfacemovement corresponding to the carrier or cylinder It is driven by gearG, which meshes with the cylinder-gear B.-

The contact-surfaces of the rolls F and G move at different speeds,causing the bronze to be transferred to and spread upon the roll G in aneven manner and all small bunches or lumps of bronze crushed and leveledon the surface of said roll.

For'retaining the sheets upon the carrier I employ two or more series ofstrings or carrierbands, H and K, said strings being arranged in closeseries or about one-half inch (more or 1ess)apart, and extending aroundthe respective brushes I and J, with suitable guiding-rolls,

and brushing devices can be employed, if desired, each constructed andarranged in relation to the last, substantially as those herein shown,the diameter of the cylinder 13 being proportioned to meet therequirements of the same.

The guiding-rolls m m are covered with a soft orelastic material, andare given movement to correspond with the movement of thecarrier-surface, so that the strings H K and cylinder B act together forcarrying forward the printed sheets beneath the cleaning and polishingbrushes I J. The several strings being arranged near to each otherenables the machine to operate as readily on a small card as on a broadsheet, so that work of all sizes within the maximum limit can be runthrough the machine without regard to the order of feeding, in theseveral sizes.

The guide-rolls m andm may be geared to the cylinder in the mannershown, or otherwise operated at the proper speed.

The brushes I and J may be formed of goathair or similar suitablematerial, and said brushes are mounted in cases or drawers 1 J, whichare provided with a central opening, through which the brush works, andwith receptacles or side grooves, 8, into which the sur plus bronzetaken up by the brushes is deposited.

A bar, 1', is arranged within the case for freeing the brush from bronzeby contact with the ends of the hairs or bristles. The cases completelyinclose the brushing devices, and they are supported in the frame A insuch manner that they can readily be withdrawn from the machine and thedeposited bronze removed through suitable opening, Z, in their ends,when desired.

The brushes are revolved at high speed in the direction indicatedby'arrows, Figs. 2 and 5, by means of bands from the pulley M of thedriving-shaft M, as shown in Fig. l and by dotted lines, Fig. 4'.

The journal-boxes of the brushes and guiding-rolls may be madeadjustable, so that the parts can be properly set in relation to thesurface of the carrier or cylinder, and the bars i may be arranged toadjust toward or from the brushes, as desired.

The distributing-roll G and feed devices may also be made adjustabletoward or from the cylinder, and adjustable partitions may be used inthe feed-hopper when it is desired to spread the bronze only part thewidth of the machine.

A brush, N, may be arranged at the lower part of the frame for cleaningthe surface of the cylinder B. The cylinder B is operated by a pinion onthe driving-shaft M, which meshes with the gear B on the cylinder-shaft.

The frame A is inclosed to retain the dust, and has a draw, A, in thelower part and a hinged cover, A at the top. The upper portion of theframe, which supports the several rolls and brush devices, is hinged tothe lower portion, as at a so that said upper portion can be turned backfor opening the machine along the surface of the carrier, or along theline traversed by the sheets on their way through the machine. Hence ifanything interferes with the progress of the sheet it can readily beremoved from the machine by sim ply throwing off the bands which drivethe brushes and raising the upper portion of the frame and mechanismsupported thereby.

In the operation of the machine the cards or sheets previously printedwith the proper sizing in the ordinary manner are fed into the machinefrom the table E between the surfaces of the endless carrier or cylinderB and the roll G, which latter acts as a feed-roll, and also transfers acoating of bronze to the surface of the sheets. The sheet then passesbeneath the first brush, which removes the surplus bronze, except suchas may be held under the strings or bands H, and possibly a small amountthat escapes the brush.

It then passes under the second brush, J, (the cords K occupying spacescleaned by the first brush,) and said second brush removes the bronzethat was retained by the cords or bands H, or any remaining on theunsized surface of the sheet. The sheet is then released from thecylinder and directed to fall on the fly-board D by the guide (I.

The brush N may not be required with ordinary thin paper; but whenrunningthick cards a little bronze may find lodgment on the cylinderalong the edges of the cards, as the brushes cannot work into the smallangle sufficiently close to perfectly clear it. In this case the lowerbrush, N, is useful to keep the surface of the carrier perfectly clean.

The machine can be quickly cleaned up by removing the hopper F and rollG, and then starting the machine.

If it is desired to give the work an extra polishing, it can be runthrough after the roll G is removed.

This machine is simple and quick in its action, is neat and convenientfor use, and will operate on very small cards with the same facility aswith large sheets. The bronze is not subjected to agitation, and butlittle bronze is put onto the sheets except such as adheres to the sizedsurface, and the consequent amount of dust set in motion iscomparatively slight. Hence it works with great economy in the use IIS -with an endless carrier or cylinder, of two or v of bronze, while thebrushes can readily be removed for relieving them and their cases fromthe bronze-powder collected therein.

If desired, two distributing-rolls, G, may be employed, both working incontact with the roll F or with each other and with the cylinder B;also, if desired, an endless belt could be employed in lieu of thecylinder. I prefer, however,the construction shown and described.

In practice the frame A may be made with an exterior skeleton of metalfor supporting thejournal-bearing, and with a separate inside lining orcasing of sheet metal or other suitable material for forming theinclosingcase to retain the dust; or, if preferred, the

sides may be cast whole, and the top, front,

and rear be put on in the manner of lagging, or otherwise.

What I claim as of my invention, and desire to secure by Letters Patent,is-

1. In a bronzing-machine, the combination,

more series of strings or sheet-retainin g bands arranged at shortintervals apart across the surface of said carrier, with the bands orstrings of one series located to Work at positions intermediate to thoseof the other series, substantially as hereinbei'ore set forth.

2. The combination, with the cylinder or carrier B, of the brushes I andJ, the sheet-retaining strings H- and K, arranged in interacting series,and the string guiding-rolls m, m, and. n, substantially as and for thepurposes set 3. The combination, with the frame A and carrier B, of therevolving brushes separately mounted in inclosing-cases, which areadapted for removal from the frame, in the manner described.

4. The drawer-cases I J, for containing and supporting the revolublebrushes, constructed with the central bottom opening, side receptaclesor grooves, s, and clearing-bars i, as described, in combination withthe frame and sheet-carrying mechanism in a bronzing -machine,substantially as and for the purposes set forth;

5. The removable end supports, F carrying the feed-hopper F anddelivering-roll F in combination with the distributing-roll G and frameA, substantially as described.

6. The inclosed frame A, constructed substantially as shown anddescribed, with its upper portion, which supports the feeding andbrushing mechanisms, hinged, as at M, to its lower portion, in which ismounted the carriercylinder B, for the purpose set forth.

7. The combination of the cylinder B, provided with gear B, thedriving-shaft M, having pinion and belt-wheel M, the brushes IJ, thebronze-feediu g rolls F and G, and the string guiding-rolls m m, withtheir several operating gears and belts, arranged in the mannersubstantially as shown and described.

Witness my hand this 9th day of July, A. D. 1881.

JOSEPH F. SARGENT.

Witnesses:

OHAs. H. BURLEIGH, GEO. M. REED.

